Malicious PDF — malware analysis report

Static analysis result for SHA-256 e597d1ee0dccf2a7…

MALICIOUS

PDF

75.4 KB Created: 2021-03-24 05:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3dd7ac021eb1cefd971a3b0c70712b0e SHA-1: 5c623a0c086cb678dbc10d4691adde39c1d3c334 SHA-256: e597d1ee0dccf2a7d7a03e6e64c5f877aaad106586d0d6a81d10e065b91288c6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting, suggesting a phishing or spam campaign disguised as scholarship essay samples. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/award?keyword=scholarship+essays+samples+pdf PDF link annotation
    • http://vududodudo.22web.org/cakewalk_pro_audio_9_completo_portugues.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/1pjgigS/lotazojutegelimub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_6042f4b6eff19.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/Tigjgha/townkins_wonderland_village_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/Bhdhgjd/airpods_pro_serial_number_different.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405687/normal_60062541cccac.pdfIn PDF document text
    • https://cdn.sqhk.co/sozasusu/gdjgihV/72715211511.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/cEjhka7/79506080153.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/hichjEi/2760561924.pdfIn PDF document text
    • https://cdn.sqhk.co/dikarulik/iifGhgP/36190934780.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ghibmia/minecraft_water_world_seed_xbox_one.pdfIn PDF document text
    • http://mavedelusudefiv.22web.org/gifotaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/iiQihyU/gefikawumokadilewob.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/05Wme5p/62449948005.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7100ea-95bc-4dfe-a272-f1fad5aec99e/35577262893.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/72003751930.pdfIn PDF document text
    • http://giwigevo.rf.gd/18060347263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40725974-4d24-4647-8c14-f4fa17aad78a/ap_9th_class_physics_textbook_english_medium.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 5600 bytes
SHA-256: 857ad5a9bdd3d7a37a47ff5f8fa8c99c1dfd52ad4e4e1aa358f56850d0b2743b
font_01_sfnt_off0000fba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA7 10892 bytes
SHA-256: c2c7f776b4cb89b9d9a27b37930aaaf7f0ff3e7213f923a623d67b6266b8217e

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